Kellogg



" Dec. 11, 1951 Filed May 15, 1946 J. KELLOGG LUBRICATOR 6 Sheets-Sheet1 J. KELLOGG Dec; 11, 1951 LUBRICATOR 6 Sheets-Sheet 4 Filed May 15,1946 J. KELLOGG LUBRICATOR I Dec. 11,1951

6 Sheets-Sheet 5 Filed May 15, 1946 Patented Dec. 11,1951

LUBRICATOR Joseph Kellogg, Milwaukee, Wis., assignor to NordbergManufacturing (30., Milwaukee, Wis.

Application May 15, 1946, Serial No. 669,960

This invention relates to bearing lubricators and more particularly to abearing lubricator for a mine hoist, or the like.

In mine hoists now being made it is common practice to have two hoistdrums mounted on a single shaft with one drum keyed to the shaft and thesecond drum provided with bearings rotatable on the shaft. The seconddrum is selectively connected to the shaft through a clutch so that itmay either rotate with or independently of the shaft. Separate brakesare provided for each drum so that the rotation of either drum may bestopped independently of the other. When the clutch between the seconddrum and the shaft is disengaged and the second drum held againstrotation by its brake, the shaft may be rotated in the bearings of thesecond or stationary drum while rotating the first drum. At such time itis essential to provide adequate lubrication for the bearings.Lubrication must also be provided when the second drum is rotated whilethe first drum and shaft remain stationary. However, when the drumsrotate simultaneously no lubrication is required as there is no relativemovement of the shaft and drum.

One object of the present invention is to provide a lubricatingmechanism which will be effective to lubricate the bearings between afixed drum and a rotatable shaft.

Another object is to provide a lubricator which, during the operation ofone mine hoist drum, will become effective to lubricate a bearing on astationary mine hoist drum on the same shaft.

A further object is to provide a lubricator for a double drum mine hoistwhich will provide proper lubrication for a drum bearing upon relativemovement between the drum and the shaft on which it is mounted.

A further object is to provide a drum lubricator for double drum minehoists which may be carried by a drum.

A still further object is to provide a lubricator for a double drum minehoist which will lubricate the bearings upon relative movement of theshaft and a drum.

A still further object is to provide a lubricator for a mine hoisthaving an improved lubricant D mp.

A still further object of the invention is to provide a lubricator for amine hoist or the like having an improved grease reservoir.

A still further object of the invention is to provide a lubricator formine hoists or the like, which has a minimum of accurately machinedparts.

Claims. (Cl. 184=-6) A still further object is to provide a lubricatorfor a mine hoist or the like having an improved pump actuator.

Another object is to provide a rotatable bearing lubricator which willhave minimum response to centrifugal forces.

Other objects will become apparent upon considering the followingspecification which when taken in conjunction with the accompanyingdrawings illustrate a preferred form of the invention.

In the drawings:

Fig. 1 is an elevational view partly in crosssection of a double drummine hoist showing the lubricating mechanism, forming the subject matterof the present invention, in place;

Fig. 2 is a slightly enlarged view of the lubricant pump and bearinglubricator;

Fig. 3 is an end view of the lubricant pumps showing the cam actuator;

Fig. 4 is a cross-sectional view through one of the bearings, showingthe end of the lubricant reservoir;

Fig. 5 is an elevationalview of one set of lubricant pumps, partsthereof being broken away and shown in cross-section to more clearlyillustrate other parts;

Fig. 6 is an end View of the lubricant pumps, shown in Fig. 5, withparts thereof being broken away and shown in cross-section to moreclearly illustrate other parts;

Fig. 7 is an elevational view partly in crosssection of the lubricantreservoir; and

Fig. 8 is a cross-section taken on the line 8-8 of Fig. '7, looking inthe direction of the arrows.

Referring to the drawings and particularly to Fig. 1, the mine hoist hasa central shaft 20 mounted between a bearing 2! and a similar bearing(not shown) on the opposite end of the shaft. The shaft may be driven byany type of prime mover (not shown). A drum 23 is keyed on the shaftthrough a key 24 and is adapted to turn therewith. The drum '23 may bestopped and controlled by a brake (not shown). A second drum 25 isjournaled on the shaft and may have roller bearings 21-27, or the like,to reduce friction between the shaft and the drum.

A clutch having a driving member 30 is mounted on a hexagonal section ofthe shaft 20 to turn therewith and engages a driven clutch element 3|,fixed on the drum 25 so that when the clutch Zso engaged the drum 25will turn with the shaft Brake drums 34 (only one of which is shown) areformed on each of the drums 23 and 25,

3 which cooperate with brake shoes 35 to control the movement of thedrums 23 and individually.

The drum 25 may also be operated independently to lower the skip bygravity by releasing the clutch -33 and controlling the downwardmovement of the skip through the brake 34-35.

Thus there is relative rotation between the shaft 20. andthe bearings271 both when the shaft rotates and the drum 25 remains stationary andwhen the drum 25 rotates, by releasing both the.

brake and the clutch, and the shaft 20 remains stationary. At such timesit is necessary to provide lubrication for the bearings 2-1 and. to ac--complish this a set of lubricant pumps. generally designated 3?, in Fig,1, is mounted from a.

channel-shaped platform 42' carried between hubs 4c of the drum 25. Thelubricant pumps of which there are four, areshown in detail in Figs. 2,3, 5 and 6. Referring to Figs. 2 and 3 the hubs lflsupport thechannel-shaped platform 42 which extends between the hubs on theopposite sides of, the drum 25.

A- lubricant reservoir 45. which is shown in detail in Figs. 7 and 8 andwhich will be described more fully below, is mounted on the channel 42and held thereon by a pair of straps 45 one of which is shown in Fig. 4,the straps being welded or otherwise permanently fixed. to the channel42. The lubricant reservoir 55 supports a pair of wings 48-48, Fig. 3,which extend outwardly at right, angles to the reservoir and tothelongitudinalv axis of the channelA-Z to support the four lubricant pumps3 The lubricant pumps are each connected to thewings 48 -by meansofbolts 5fl -59.which pass through the wings 48 and are secured inthreaded apertures 52 formed in yokes 54-.55 of. the pump frames, asseen in Fig. 6.

Referring to Figs. 5' and 6 the pumps are mounted in pairs in a framecomprising a, base 55, the oppositeends o t-which support the yokes54-54 and 55-55 both yokes 54-54 and, 55-55 extending at right anglesto; thelength of; the base55f and at opposite endsthereof,

Yokes 5:5.-5 5.,have parallel arms 5'!--5-l which carry aligned pivots58-53, the pivots mounting centering bloclgs 80-53; in the yokes5555-.for

placed at right angles to the axis of. the pivots 58 -58. The-cylinder;G3 has limited; rotational movementabout thepivots 64 which, combinedwith the limited rotational movement of; the;

block 56- about the pivot 58, gives universal move-v ment to thecylinder 53.

A valvechamber comprising a nip-ple 65 having external threads Sbscrewsinto the outer end of the cylinder 63. The nipple has interior threadswhichreceive a valve stop 61 adapted to limit the movement ofa ballcheck valve 68 oil its seat 65; The valve seat 69 is held onthe outerend of the nipple 65 by a collar'lD-which holdsthe valve seat on the endof the nipple.

Theamount of grease pumped may be regue.

lated by changing the clearance between the seat 6}] and the stopS'Lwhich allows. more or less slippage of grease through the valveduring closing of the valve, thus varying the quantity.-

pumped.

A grease. supply pipe 13 communicates; with the valve chamber 65 andconducts grease, as seen in Figs. 2 and 3, from the reservoir 55 througha shut-01f cock 15, a vertical pipe 16, a horizontal feeder ll-ll,through the pipes 13 and into the low pressure side of the pump 31.

Referring again to Figs. 5 and 6, the inner end of the cylinder 63 isprovided with a machined bore which receives a hollow piston 82 having amachined fit in the bore 85. As the piston moves into the cylinder, 53the, grease in the cylinder is forced out of the cylinder through ahollow bore 84 in the piston into a central valve chamber 85.

'The valve chamber contains a spring loaded ball? valvev 86. The greasepasses from the passagewayv 84 past the. valve 86 and into a passage 81formed in a hollow piston 88. The valve chamber maybe formed by screwingthe extended ends of the pistons 82 and 88 into a spool 50 which spoolwill be described in detail below.

The piston 88 is. machinedv to fit in abore 92 inahigh pressure cylinder95. The areas of the pistons 82 and 88 may be such that no pumpingoccurs between, the cylinders 63. and 95. This may be accomplished. bymaking the metal cross-sectional area of the piston 82 equal to thetotal areaof thepiston 88-so that a. mere transfer occurs fromthecylinder 63 to the cylinder 95 as the piston 32 moves into thecylinder 53.

If desiredsthe metal cross-sectional area of. the piston 82. maybe madelarger than the total area of. the piston 88.. in. which. event the.pump becomes a double-acting pump and grease isemitted on bothstrokes'of, thepistons.

Grease received through the opening 8? into the cylinder 95, as thepiston 82' enters the cylinder. 5,3,,is ejected from the cylinder 95when the piston Ban-loves into that cylinder,- the grease passingthrough. an. opening 98; in anipple 99. Thenipple 59 containsa ballvalve[55 mounted on a seat, in the interior of the nipple and held on theseat by a. spring 52. The spring I52 is mountedon a stemor pin;lM-Whichis mounted on a nipple screwedin the. discharge pipe I05 so thatthe grease may be-pumped-around the. pin and through a central. aperturein. the: nipple. The discharge-pipeis. held-on the outer end of thenipple, by:a.collar itfiwhich. screws thereon,

and clamps the discharge pipe in; place.

The dischargepipes I55 lead from the discharge side oithe pumpsdownwardly into the channel support 42, asseen in Figs. 2,3 and 4, andconduct grease from the four pumpsfil to the four bearings. 21 whichsupportthehubs 40, each pump 31 lubricatingonebearing27.

If desired additional; pumps 3-5 may be used to lubricate other pointsoffriction.

Each cylinder 95 is heldyincentering blocksl0! by pivots IBBsimilartothe-centering blocks 65 and the, pivots; 64. The-centering blocks HT.

are held in the yokes 54 by means ofgpivots i 15' similar to;the, pivots5B.'so that the-cylinder 95 has a substantially universal movementsimilar to the cylinder 63-.

The universal movement of the cylinders 53 and 95' provide for'automaticalinement of. the pistons 82 and 85 and eliminate; the; accuratemachining usually necessary to accomplish this.

result.

The spool: 95 heretoforementioned" has outstanding annular flanges-il2-l-l2j which receive actuator blocksrl M, Figsfi and 6;. The actuatorblocks. are pivotally mounted on a substantially U-shaped actuating;lever; I I5. (Figs. 55 and. 6).

The actuating lever H5 is pivoted on a fulcrum:

H6 on the base 55' and is adapted to reciprocate the pistons 82 and 88as the actuating lever Il5 oscillates about the fulcrum I I6.

A pin H3 passes through the opposite sides of the U-shaped actuatinglever H5 and receives a push rod I20, Fig. 3, which actuates the lever II5 causing the latter to oscillate. The push rods I are each connectedto a cam roller I22 which are operated by cams I24-I24 fixed on theshaft 20. The rods I20 and the rollers I22 are .maintained in properaligned position by means of the links I25I25 which are pivoted to theroller I22 on one end and to a bracket I26 on the other end. The bracketI26 is formed on and depends from the channel support 42.

The reservoir 45 is best shown in Figs. '7 and 8. Referring tothosefigures it" will be seen that the reservoir comprises a cylinder I30containing a spring pressed plunger I32 held by a guide rod I33. Thecylinder has a spring housing I35 attached thereto through which theguide rod I33 passes, the guide rod extending through the end wall ofthe housing and forming a measurement of the amount of grease in thecylinder I30. The plunger I32 is urged inwardly by a set of compressionsprings I--I4I', two springs being used to give a greater compression ina short distance.

The inner end of the cylinder I30 is provided with a closure head havinga disc I43 with a nipple I44 mounted centrally therein and supported atits outer end by a frustro-conical plate I46 which contacts the nippleat its smaller diameter and is fixed to the disc I43 at its largerdiameter. A flange I41 is formed on the members I43 and I46 to fastenthe cover to the cylinder I30 through a second flange I48 and a plu-Operation Referring to Fig. 1, in operation the drum 25 may be heldstationary by setting the brake 34-35. The clutch 30-3I may then bedisengaged. Under this condition the shaft 20 may be rotated to drivethe drum 23. Similarly the shaft 20 may be held stationary and theweight of the skip (not shown) utilized to rotate the drum 25 on theshaft. With the latter operation the brake 34 is used to control thespeed of the drum. In either event, that is, when the drum 25 operatesand the shaft 20 is held stationary, or, when the shaft 20 turns and thedrum 25 is held stationary, it is necessary to supply lubricant to thebearings 21.

Whenever the relative motion occurs between the drum and the shaft thecams I24 operate the followers I22 (see Fig. 3) which reciprocate therods I20 and cause the levers II5 to oscillate about the fulcrum II6reciprocating the pistons 82-92 in the cylinders 63 and 05. When thepistons reciprocate, oil is drawn from the reservoir (Fig. 3) throughthe cook 15, the pipes 16 (Fig. 2), the pipes 11 and 13 (Fig. 3) andinto the cylinder 63, as the piston 80 travels towards the left, as seenin Fig. 5. On the stroke in the 6 opposite direction, the piston 82moves into the cylinder 63 closing the valve 68 and forcing the trappedgrease through the passage 84 in the hollow piston 82, past the springpressed valve 86, through the passage 81 in the hollow piston 88, andinto the cylinder 95.

On the opposite stroke of the pistons more grease is drawn through thevalve 68 into the cylinder 63 and simultaneously the grease which hasbeen transferred from the cylinder 63 to the cylinder on a previousstroke, is forced out of the cylinder 95, through the valve I00, andinto the discharge pipe I06.

The discharge pipes I06 from the four pumps 31 are carried in the bottomof the channelshaped support 42 and conduct the grease to the fourroller bearings 21, Figs. 2 and 4. The pumps 31, shown in Fig. 5, arearranged so that each pair of opposed cylinders have universal movementand may thus accommodate themselves automatically to the alignment ofthe pistons 82--88.

This construction reduces wear on the cylinders and eliminates thenecessity of piston rings, packing rings, or other devices to preventthe escape of grease.

The grease may be replenished in the reservoir 45 by affixing a greasegun to the standard grease gun nipple I55 and pumping the grease pastthe shut-off valve 15 directly into the reservoir 45.

Grease may be forced through the pumps by shutting the cook 15 andapplying an external grease gun to the fitting I55. Similarly grease maybe forced to any particular bearing by shutting the cock 15 and all thecooks I51 except the one leading to the desired bearing and applying theexternal grease gun.

The amount of grease in the reservoir 45 is indicated visually by notinghow far the piston guide rod I33 projects out of the casing I35.

It; will be realized that the hereinbefore described structure is to betaken merely as a preferred form of the invention and that variouschanges in size, shape and arrangement of parts may be made withoutdeparting from the spirit of the invention or the scope of the subjoinedclaims.

That which is claimed as new and is desired to be secured by LettersPatent is:

1. In a lubricating device of the character described, a rotatableshaft, a plurality of cams on said shaft, a drum mounted on said shaftto rotate relative thereto, a plurality of bearings between said shaftand said drum, a platform supported by said drum, a lubricant reservoirmounted on said platform, a plurality of grease pumps mounted adjacentsaid reservoir, means to supply grease from said reservoir to saidpumps, means to conduct grease from said pumps to said bearings, a camfollower actuated by each of said cams, and means operated by said camfollowers to actuate said pumps.

2. In a lubricating device of the character described, a shaft adaptedto be rotated, a drum mounted on said shaft, a plurality ofsubstantially solid bearings between said shaft and said drum, a clutchmounted between said shaft and said drum to drive the drum from theshaft, a brake on said drum to control the movement of the drumindependently of the rotation of the shaft, and means to lubricate theshaft when the shaft is stationary and the drum is rotated or when theshaft is rotated and the drum is stationary, ineluding a bearinglubricator mounted. on said drum and adapted to supply lubricant to saidbearing and fireans on said shaft 't'o actuatesaid bearing I'ubricaton8'. Ina mine hoist or'th'e 1ike';-a shafemember, a drum' member mountedon" said' 'shaf-t and-adapted to be rotated relative tos'aid shaft,-bearings between the opposite ends- 0f said driifii and said shaft, abearingiubricatof c'omfirisiiig a} plurality of lubricant umps carriedby one of said niein' b'ers at a point intermediate said bearings andwithin said di 'uri'i', each lubricant ptifiipflsimpiyihg i'ubricant toone of said bearings, a platfor ni'cafriedby the same one of saidmembers and re: tatable unitarily therewith; a-lubricant reseri oii ofsubstantial capacity moiinte'd ofi-said filatfoim adjacent said pii'nipssaid iies'ervoii 'hayi-iig an e2- tended arm movable axial y withincreases arid decreases-in tlie amoufit of lubricant in s'aid'res'ervo'i'r, and means 011 the other said member to actuate s'ai'd pumps-'-to' lubricate-thebearings u 'on' i'eiative mov'ementof the members. I

4.- In a mine hoist o'r tz-ie' -likega shaft membei", a drum membermounted on said shaft member and adapted to be rotated relative thereto,a plurality-of spaced bearings between thedr uiii r'nemher and the shaftmember'; and a bearing lubr-i eating system comprising a plurality oflubr ioant pumps carried by one ofsaid membeis' at a' po'int within saiddrum member, a support earried by one of said members and rotatableuni-'tarily theiewitliaiubiicant reservoir moimte'd on said supportadjacent said pumps; and a cam connection between saidmembersincludingoppose'd cam e1en1ents;-and actuating means-for saidpumps 50-- s'itioned for movement in response to said cam el'eifn'ents'.

5.- The structure of claim' 4 characterized by and including one or morecams mounted for rotatio'n' with the shaft member, dammed membersmovably mounted on the dr'urn' member; and pump actuating members"connected to said cammed members; a I

J OSEPH- K'ELLOGG.

REFERENCES CITED j be following" references are of record in the file ofthis patent:

UNITED STATES PA'IENTS

